You are living in a place where you were able to talk to those who were a lot older than you and I who were living in Europe during the 1920's and 30's. How big was the "Jewish problem" in Europe back then in France, Poland, Czechoslovakia, etc. back then ? I've heard that anti semitism had a larger presence in Poland than in Germany during that era and France wasn't to far behind Germany.
Jews have always been targeted in Europe for hundreds of years.